In-mold formed paper corner protector based on homogeneous flexible hinge structure

By using a homogeneous toughness hinge structure for in-mold formed paper corner protectors, and combining corrugated cardboard strips and guide paper ropes, the problems of paper corner protectors being prone to moisture delamination and fiber breakage are solved, achieving environmentally friendly and efficient production and performance improvement.

CN224727490UActive Publication Date: 2026-09-08MYS GRP CO LTD
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Patent Information

Application Number
CN202522046710.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-23
Publication Date
2026-09-08
Estimated Expiration
2035-09-23

AI Technical Summary

Technical Problem

Existing paper corner protectors are prone to moisture delamination in laminated structures, resulting in weak bonding and fiber breakage, leading to poor fatigue strength and impact toughness. Furthermore, with the implementation of plastic bans, traditional paper corner protectors need to find environmentally friendly alternatives.

Method used

The in-mold formed paper corner protector adopts a homogeneous toughness hinge structure. It is formed by continuously rotating and winding multiple layers of single-sided corrugated cardboard strips and applying polymer water-soluble adhesive, combined with guide paper ropes to form a high-toughness hinge structure. The in-mold pressing process achieves environmentally friendly production.

Benefits of technology

This technology improves the compressive strength and cushioning effect of paper corner protectors, achieves an environmentally friendly and efficient production process, and avoids the material waste and structural fragility problems of traditional paper corner protectors.

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Abstract

The utility model relates to a kind of in-mold forming paper corner bead based on homogeneous toughness hinge structure, paper corner bead is made by core blank mould pressing, the core blank is formed by single-face corrugated board band in the way that preset value included angle is presented in corrugated ridge line direction and length direction, through multilayer continuous rotation winding and adhesion, at least one guide paper rope is equipped in the area where the core blank is bent into interior angle.This paper corner bead is wound by a complete single-face corrugated paper band, compared with traditional kraft paper paper corner bead, it uses less material, and the supporting structure of corrugation can greatly improve the compressive strength, with good buffering and damping effect.
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